Fuel cell, method for production of the fuel cell, electronic device, enzyme-immobilized electrode, method for production of the electrode, water-repellent agent, and enzyme-immobilized material

Disclosed is a fuel cell having such a structure that a positive electrode (2) and a negative electrode (1) face to each other across an electrolyte layer (3), wherein the positive electrode (2) comprises an electrode having an oxidoreductase or the like immobilized thereon and at least a part of the surface of the electrode is rendered water-repellent when the electrode has void spaces therein.  For example, the surface of the electrode may be rendered water-repellent by applying a water-repellent agent on the surface of the electrode.  The water-repellent agent to be used may be one comprising a water-repellent material such as a carbon powder and an organic solvent capable of causing phase separation from water such as methyl isobutyl ketone.  It becomes possible to provide a fuel cell which can produce a high electric current value steadily when an electrode has void spaces therein, and also provide a method for producing the fuel cell.